Class | Sass::Selector::SimpleSequence |
In: |
lib/sass/selector/simple_sequence.rb
|
Parent: | AbstractSequence |
A unseparated sequence of selectors that all apply to a single element. For example, `.foo#bar[attr=baz]` is a simple sequence of the selectors `.foo`, `bar`, and `[attr=baz]`.
members | [R] |
The array of individual selectors.
@return [Array<Simple>] |
Non-destrucively extends this selector with the extensions specified in a hash (which should be populated via {Sass::Tree::Node#cssize}).
@overload def do_extend(extends) @param extends [{Selector::Simple => Selector::Sequence}]
The extensions to perform on this selector
@return [Array<Sequence>] A list of selectors generated
by extending this selector with `extends`.
# File lib/sass/selector/simple_sequence.rb, line 64 64: def do_extend(extends, seen = Set.new) 65: extends.get(members.to_set).map do |seq, sels| 66: # If A {@extend B} and C {...}, 67: # seq is A, sels is B, and self is C 68: 69: self_without_sel = self.members - sels 70: next unless unified = seq.members.last.unify(self_without_sel) 71: [sels, seq.members[0...-1] + [unified]] 72: end.compact.map do |sels, seq| 73: seq = Sequence.new(seq) 74: seen.include?(sels) ? [] : seq.do_extend(extends, seen + [sels]) 75: end.flatten.uniq 76: end
Returns a string representation of the sequence. This is basically the selector string.
@return [String]
# File lib/sass/selector/simple_sequence.rb, line 121 121: def inspect 122: members.map {|m| m.inspect}.join 123: end
Resolves the {Parent} selectors within this selector by replacing them with the given parent selector, handling commas appropriately.
@param super_seq [Sequence] The parent selector sequence @return [Array<SimpleSequence>] This selector, with parent references resolved.
This is an array because the parent selector is itself a {Sequence}
@raise [Sass::SyntaxError] If a parent selector is invalid
# File lib/sass/selector/simple_sequence.rb, line 41 41: def resolve_parent_refs(super_seq) 42: # Parent selector only appears as the first selector in the sequence 43: return [self] unless @members.first.is_a?(Parent) 44: 45: return super_seq.members if @members.size == 1 46: unless super_seq.members.last.is_a?(SimpleSequence) 47: raise Sass::SyntaxError.new("Invalid parent selector: " + super_seq.to_a.join) 48: end 49: 50: super_seq.members[0...-1] + 51: [SimpleSequence.new(super_seq.members.last.members + @members[1..-1])] 52: end
Returns whether or not this selector matches all elements that the given selector matches (as well as possibly more).
@example (.foo).superselector?(.foo.bar) #=> true (.foo).superselector?(.bar) #=> false
@param sseq [SimpleSequence] @return [Boolean]
# File lib/sass/selector/simple_sequence.rb, line 108 108: def superselector?(sseq) 109: (base.nil? || base.eql?(sseq.base)) && rest.subset?(sseq.rest) 110: end
@see Simple#to_a
# File lib/sass/selector/simple_sequence.rb, line 113 113: def to_a 114: @members.map {|sel| sel.to_a}.flatten 115: end
Unifies this selector with another {SimpleSequence}’s {SimpleSequence#members members array}, returning another `SimpleSequence` that matches both this selector and the input selector.
@param sels [Array<Simple>] A {SimpleSequence}’s {SimpleSequence#members members array} @return [SimpleSequence, nil] A {SimpleSequence} matching both `sels` and this selector,
or `nil` if this is impossible (e.g. unifying `#foo` and `#bar`)
@raise [Sass::SyntaxError] If this selector cannot be unified.
This will only ever occur when a dynamic selector, such as {Parent} or {Interpolation}, is used in unification. Since these selectors should be resolved by the time extension and unification happen, this exception will only ever be raised as a result of programmer error
# File lib/sass/selector/simple_sequence.rb, line 91 91: def unify(sels) 92: return unless sseq = members.inject(sels) do |sseq, sel| 93: return unless sseq 94: sel.unify(sseq) 95: end 96: SimpleSequence.new(sseq) 97: end